/Engine/Source/Editor/PropertyEditor/Public/PropertyHandle.h
Adds a child structure
An array of interfaces to the properties that were added
[TArray](API\Runtime\Core\Containers\TArray)< [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [IPropertyHandle](API\Editor\PropertyEditor\IPropertyHandle) > > AddChildStructure ( [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [FStructOnScope](API\Runtime\CoreUObject\UObject\FStructOnScope) > ChildStructure )